拓扑量子场论与超凯勒几何
Topological quantum field theory and hyperkähler geometry
摘要:
Rozansky和Witten提出了一个目标空间为超凯勒流形的三维sigma模型。他们指出,这个理论有一个相关的TQFT,希尔伯特空间由某些超凯勒流形的上同调群给出。另一方面,Murakami和Ohtsuki利用普适量子不变量构造了一种修正的TQFT。我们解释如何Rozansky-Witten TQFT可以从后者通过应用“hyperkähler重量系统”。
英文摘要:
Rozansky and Witten proposed a 3-dimensional sigma-model whose target space is a hyperkähler manifold. They conjectured that this theory has an associated TQFT, with Hilbert spaces given by certain cohomology groups of the hyperkähler manifold. On the other hand, there is a certain modified TQFT constructed by Murakami and Ohtsuki using the universal quantum invariant. We explain how the Rozansky-Witten TQFT can be obtained from the latter by applying a `hyperkähler weight system'.
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